PINTO, SPAIN - FILE: Alberto Contador listens to questions from the media during his press conference pleading his innocence after being tested positive for clenbuterol in 2010. Jasper Juinen/Getty Images hide caption

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Andy Schleck climbs Galibier pass, where he won the 18th stage of the 2011 Tour de France. Thursday's 124.6-mile course ran between Pinerolo and Galibier Serre-Chevalier ski resort. Nathalie Magniez/AFP/Getty Images hide caption

itoggle caption Nathalie Magniez/AFP/Getty Images